Excellent Idea, I worked in Vanuatu for a few years and they had some excellent Webcams set up on the main island which were absolutely invaluable and seeing as how the vast majority of our flights were either leaving there or going there they helped us immensely.
I don't think liability would be an issue with the cameras would there? They're either there or not, they're provided as an "Aid" so no one should be able to sue if they were not available, but there would have to be someone responsible for looking after them of course.